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/* Copyright (c) 2001 Miller Puckette and others.
* For information on usage and redistribution, and for a DISCLAIMER OF ALL
* WARRANTIES, see the file, "LICENSE.txt," in this distribution. */
/* this file calls Ross Bencina's and Phil Burk's Portaudio package. It's
the main way in for Mac OS and, with Michael Casey's help, also into
ASIO in Windows. */
#include "m_pd.h"
#include "s_stuff.h"
#include <stdio.h>
#include <stdlib.h>
#include <portaudio.h>
#include "s_audio_pablio.h"
/* LATER try to figure out how to handle default devices in portaudio;
the way s_audio.c handles them isn't going to work here. */
/* public interface declared in m_imp.h */
/* implementation */
static PABLIO_Stream *pa_stream;
static int pa_inchans, pa_outchans;
static float *pa_soundin, *pa_soundout;
#define MAX_PA_CHANS 32
#define MAX_SAMPLES_PER_FRAME MAX_PA_CHANS * DEFDACBLKSIZE
#ifndef PA19
#define Pa_GetDeviceCount Pa_CountDevices
#endif
int pa_open_audio(int inchans, int outchans, int rate, t_sample *soundin,
t_sample *soundout, int framesperbuf, int nbuffers,
int indeviceno, int outdeviceno)
{
PaError err;
static int initialized;
int j, devno, pa_indev = 0, pa_outdev = 0;
if (!initialized)
{
/* Initialize PortAudio */
int err = Pa_Initialize();
if ( err != paNoError )
{
fprintf( stderr,
"Error number %d occured initializing portaudio\n",
err);
fprintf( stderr, "Error message: %s\n", Pa_GetErrorText( err ) );
return (1);
}
initialized = 1;
}
/* post("in %d out %d rate %d device %d", inchans, outchans, rate, deviceno); */
if (inchans > MAX_PA_CHANS)
{
post("input channels reduced to maximum %d", MAX_PA_CHANS);
inchans = MAX_PA_CHANS;
}
if (outchans > MAX_PA_CHANS)
{
post("output channels reduced to maximum %d", MAX_PA_CHANS);
outchans = MAX_PA_CHANS;
}
if (inchans > 0)
{
for (j = 0, devno = 0; j < Pa_GetDeviceCount(); j++)
{
const PaDeviceInfo *info = Pa_GetDeviceInfo(j);
if (info->maxInputChannels > 0)
{
if (devno == indeviceno)
{
pa_indev = j;
break;
}
devno++;
}
}
}
if (outchans > 0)
{
for (j = 0, devno = 0; j < Pa_GetDeviceCount(); j++)
{
const PaDeviceInfo *info = Pa_GetDeviceInfo(j);
if (info->maxOutputChannels > 0)
{
if (devno == outdeviceno)
{
pa_outdev = j;
break;
}
devno++;
}
}
}
if (sys_verbose)
{
post("input device %d, channels %d", pa_indev, inchans);
post("output device %d, channels %d", pa_outdev, outchans);
post("framesperbuf %d, nbufs %d", framesperbuf, nbuffers);
}
if (inchans || outchans)
err = OpenAudioStream( &pa_stream, rate, paFloat32,
inchans, outchans, framesperbuf, nbuffers,
pa_indev, pa_outdev);
else err = 0;
if ( err != paNoError )
{
fprintf( stderr, "Error number %d occured opening portaudio stream\n",
err);
fprintf( stderr, "Error message: %s\n", Pa_GetErrorText( err ) );
Pa_Terminate();
sys_inchannels = sys_outchannels = 0;
return (1);
}
else if (sys_verbose)
post("... opened OK.");
pa_inchans = inchans;
pa_outchans = outchans;
pa_soundin = soundin;
pa_soundout = soundout;
return (0);
}
void pa_close_audio( void)
{
if (pa_inchans || pa_outchans)
CloseAudioStream( pa_stream );
pa_inchans = pa_outchans = 0;
}
int pa_send_dacs(void)
{
float samples[MAX_SAMPLES_PER_FRAME], *fp1, *fp2;
int i, j;
double timebefore;
timebefore = sys_getrealtime();
if ((pa_inchans && GetAudioStreamReadable(pa_stream) < DEFDACBLKSIZE) ||
(pa_outchans && GetAudioStreamWriteable(pa_stream) < DEFDACBLKSIZE))
{
if (pa_inchans && pa_outchans)
{
int synced = 0;
while (GetAudioStreamWriteable(pa_stream) > 2*DEFDACBLKSIZE)
{
for (j = 0; j < pa_outchans; j++)
for (i = 0, fp2 = samples + j; i < DEFDACBLKSIZE; i++,
fp2 += pa_outchans)
{
*fp2 = 0;
}
synced = 1;
WriteAudioStream(pa_stream, samples, DEFDACBLKSIZE);
}
while (GetAudioStreamReadable(pa_stream) > 2*DEFDACBLKSIZE)
{
synced = 1;
ReadAudioStream(pa_stream, samples, DEFDACBLKSIZE);
}
/* if (synced)
post("sync"); */
}
return (SENDDACS_NO);
}
if (pa_inchans)
{
ReadAudioStream(pa_stream, samples, DEFDACBLKSIZE);
for (j = 0, fp1 = pa_soundin; j < pa_inchans; j++, fp1 += DEFDACBLKSIZE)
for (i = 0, fp2 = samples + j; i < DEFDACBLKSIZE; i++,
fp2 += pa_inchans)
{
fp1[i] = *fp2;
}
}
#if 0
{
static int nread;
if (nread == 0)
{
post("it's %f %f %f %f",
pa_soundin[0], pa_soundin[1], pa_soundin[2], pa_soundin[3]);
nread = 1000;
}
nread--;
}
#endif
if (pa_outchans)
{
for (j = 0, fp1 = pa_soundout; j < pa_outchans; j++,
fp1 += DEFDACBLKSIZE)
for (i = 0, fp2 = samples + j; i < DEFDACBLKSIZE; i++,
fp2 += pa_outchans)
{
*fp2 = fp1[i];
fp1[i] = 0;
}
WriteAudioStream(pa_stream, samples, DEFDACBLKSIZE);
}
if (sys_getrealtime() > timebefore + 0.002)
{
/* post("slept"); */
return (SENDDACS_SLEPT);
}
else return (SENDDACS_YES);
}
void pa_listdevs(void) /* lifted from pa_devs.c in portaudio */
{
int i,j;
int numDevices;
const PaDeviceInfo *pdi;
PaError err;
Pa_Initialize();
numDevices = Pa_GetDeviceCount();
if( numDevices < 0 )
{
fprintf(stderr, "ERROR: Pa_GetDeviceCount returned %d\n", numDevices );
err = numDevices;
goto error;
}
fprintf(stderr, "Audio Devices:\n");
for( i=0; i<numDevices; i++ )
{
pdi = Pa_GetDeviceInfo( i );
fprintf(stderr, "device %d:", i+1 );
fprintf(stderr, " %s;", pdi->name );
fprintf(stderr, "%d inputs, ", pdi->maxInputChannels );
fprintf(stderr, "%d outputs", pdi->maxOutputChannels );
#ifdef PA19
if ( i == Pa_GetDefaultInputDevice() )
fprintf(stderr, " (Default Input)");
if ( i == Pa_GetDefaultOutputDevice() )
fprintf(stderr, " (Default Output)");
#else
if ( i == Pa_GetDefaultInputDeviceID() )
fprintf(stderr, " (Default Input)");
if ( i == Pa_GetDefaultOutputDeviceID() )
fprintf(stderr, " (Default Output)");
#endif
fprintf(stderr, "\n");
}
fprintf(stderr, "\n");
return;
error:
fprintf( stderr, "An error occured while using the portaudio stream\n" );
fprintf( stderr, "Error number: %d\n", err );
fprintf( stderr, "Error message: %s\n", Pa_GetErrorText( err ) );
}
/* scanning for devices */
void pa_getdevs(char *indevlist, int *nindevs,
char *outdevlist, int *noutdevs, int *canmulti,
int maxndev, int devdescsize)
{
int i, nin = 0, nout = 0, ndev;
*canmulti = 1; /* one dev each for input and output */
Pa_Initialize();
ndev = Pa_GetDeviceCount();
for (i = 0; i < ndev; i++)
{
const PaDeviceInfo *pdi = Pa_GetDeviceInfo(i);
if (pdi->maxInputChannels > 0 && nin < maxndev)
{
strcpy(indevlist + nin * devdescsize, pdi->name);
nin++;
}
if (pdi->maxOutputChannels > 0 && nout < maxndev)
{
strcpy(outdevlist + nout * devdescsize, pdi->name);
nout++;
}
}
*nindevs = nin;
*noutdevs = nout;
}
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